Cisco Systems is expected to cut thousands of jobs in possibly its worst-ever round of layoffs to meet Chief Executive John Chambers’ goal of slashing costs by $1 billion. Four analysts contacted by Reuters estimated the world’s largest maker of network equipment will eliminate up to 4,000 jobs in coming months, with the average forecast at 3,000. That would represent 4 percent of Cisco’s 73,000 permanent workers. It also has an undisclosed number of temporary contractors.

Travelers in the western U.S. should not rely solely on technology such as GPS for navigation, authorities said, after a Canadian couple were lost in the Nevada wilderness for 48 days. Sheriff’s offices in remote, high-elevation parts of Idaho, Nevada and Wyoming report the past two years have brought a rise in the number of GPS-guided travelers driving off marked and paved highways and into trouble.